tattt



(No Model.)

A.PYRBBRG.

BRBAKDOWN GUN l Alazen'oed May 30,` 1893.

No. 498,427K

dgn/draw y y ArnNT trice.

ANDREV FYRBERG, OF HATFIELD, MASSACHUSETTS, ASSIGNOR TO CHARLES S. SHATTUCK, OF SAME PLACE.

BREAKDOWN GUN.

SPECIFICATION forming part of Letters Patent No. 498,427, dated May 30, 1893.

Application led November 19, 1892. Serial No. 452,473. (No model.)

To a/ZZ whom t may concern: finger' pullof the trigger standing ont within Be it known that I, ANDREW FYRBERG, a the guard G, as shown. citizen of the United States, residing at Hat- F indicates a swinging backwardly extendiield, in the county of Hampshire and State ing lever or part that serves as a rebounder 55 5 of Massachusetts, have invented a new and and main-spring carrier. Said part is pivuseful Improvement in Firearms, ot' which oted in the frame a short distance back of the following, together with the accompanythe trigger pivot by the pin f, and is formed ing drawings, is a specification suiiiciently with a point or portion 5 that engages with full, clear, and exact to enable persons skilled the back of the hammer tumbler at 6, and 6o ro in the art to which this invention appertains with a point or portion 7 that engages with to make and use the same. the top of the trigger, at 8. The main-spring This invention relates to the lconstruction H is seated upon and confined to the carrier and arrangement of parts in the lock mech- F in the manner indicated; the rear end emanism of firearms or guns; the object being bracing the bend of thespring at h, the lower 65 x5 to obtain the full force of the main spring for end of said main spring fitting a notch e on throwing down the hammer and at the same the carrier, and the upper arm of said spring time attain a rebound of the hammer when engaging beneath the heel 9 ot' the hammer the trigger is released. Also, to provide in with an upward pressure. Aspring J, termed the lock mechanism of tire-arms or guns a the rebounder spring, is strained between 7o 2o pivoted spring-pressed carrier for the main the rear end of the part F and frame, which spring, that will serve as a rebounder for retends to elevate the rear end of the part F tracting the hammer, and also as a triggerfor producing the rebound action. Spring J spring. is here shown as a flat bowed spring, but it' Anotherobject is to atorda simple and eftipreferred may be of any other suitable form, 75

25 cient means for insuring the latching down as for instance a coiled wire spring between of the barrel; also to prevent the unlatchingv the under side of part F and the lower porof the barrel while the piece is at full cock. tion of the frame, as indicated by dotted lines These objects I attain by the mechanism j on Fig. 2. explained in the following detailed descrip- I indicates the barrel latch or slide for re- 8o 3o tion and illustrated by the drawings, wheretaining the barrel in normal position, and K inthe top lever for retracting said latch. The

Figure l is a sectional View of a portion of latching slide I is provided with an extension a gun embodying my invention, and showing or connecting bar I', linked thereto by a lug the parts of the lock mechanism at their nor- ,and having a central opening Lfor passing 85 35 mal position. Fig. 2 is a view of the same the hammer. The rear end is iitted to receive with the hammer at full cock, and dotted the cylindrical hub K of the top lever K, and lines indicating the position of parts when has at one side a broad notch 'm and at the the hammer is dropped. Fig. 3 is a top view other side a narrow notch n for engaging the with the barrel removed. Fig. Llshowsaside pin lO that is fixed in and projects at either 9o 4o and top view of the main spring and its carside of the hub K. By means of this connecrier, and Fig. 5 is a bottom view of the barrel tion with its embracing notches m and n the latch operating connection. latch is withdrawn when the top lever is swung Referring to parts, A denotes the frame, B to one side; (as per dotted lines Figs. 8 and the barrel hinged tothe fore end of said frame, 5) the narrow notch n causes the lever K to 95 45 at b, to swing up at the breech for charging be positively thrown back to central position in well known manner. when the latching slide is in position for se- C indicates the hammer pivoted in the curing the barrel; consequently if the lever frame at ct and fitted with notches l and 2 K stands inclined it shows that the barrel on its lower part or tumbler for engagement latch is not securely adjusted. roo

5o with the point 3 of the trigger D, which latter P indicates the spring for pressing forward is pivoted in the frame by the pin d; the the latching slide I and its connecting bar I.

The forward side of the top lever hub is liattened or slabbed off and fitted with a shoulder fr. The rear end 12 of the hammer C engages the flattened portion or shoulder when at full cock and prevents movement of the top lever for unlatching the barrel until the hammer is let down to the safety notch or position indicated in Fig. l.

S indicates the firing pin disposed in the frameas shown, to be forced into the cartridge head by the fall of the hammer.

In the operation, when the hammer is d rawn back to full cock the parts assume the position indicated by full lines Fig. 2, the point of the trigger 3 taking into the notch 2. The trigger then being pulled off the hammer is thrown down by the full force of the main spring, the parts taking position as indicated by dotted lines in Fig. 2; the trigger swinging the part F by its top S engaging the end '7 of said part, and thereby compressing its spring J. The parts remain in that position so long as the trigger is pressed or held back by the finger, but instantly when the trigger is released the spring J throws up the rear end of the carrier F and effects rebound action by reason of the end 5 of the part F acting on the back of the hammer tumbler at 6, and thus bringing the parts into their normal position, as indicated in Fig. l, the triggertaking into notch l and serving to hold the hammer at position of safety. The main-spring being mounted on the rebounder or carrier F is not injuriously affected by the spring J, and said spring J is not injuriously affected in its action by the pressure of the main spring.

I claim as my invention herein to be secured by Letters Patentl. In a lock mechanism for fire-arms, in combination with the hammer and trigger, a swinging lever or carrier having the main spring mounted thereon, the free end of said spring engaging a lug on the back of the hammer, said carrier provided with an end that engages the lower part of the hammer to impart rebound movement thereto, and a spring that elevates the rear end of said carrier and effects the rebound action under control of the trigger, substantially as set forth.

2. The combination, substantially as described, of the hammer having notches l and 2, back surface G and lug 9, the trigger having the point 3 and surface S, the rebounder or carrier having points 5 and 7 that respectively engage with the back 6 of the hammer and back 8 of the trigger, the main-spring mounted on said carrier and engaging the lug 9 of the hammer, and the rebound-spring acting to elevate the rear end of said carrier, for the purposes set forth.

3. The barrel latch I and the backwardly extending connecting bar I linked thereto, its rear part fitted to receive t-he hub of the top lever and having the narrow notch n and wide notch m at opposite sides thereof, in combination with the top lever its hub provided with a transverse hole, having a pin l0 fixed therein with projecting ends that enter said notches, one of said ends being closely engaged between the sides of the notch n, while the other is permitted free forward action in the notch fm, for the purpose set forth.

4. The combination, of the top-lever having its hub fitted with a flattened surface or shoulder r, and the hammer having a portion, as 12, that engages therewith and prevents operation of said top-lever when the hammer is at full cock, substantially as set forth.

5. A fire-arm comprising the frame, the barrel hinged to the fore end thereof, the latching-slide, its open centered connecting bar notched, as at fn, the top lever its cylindrical hub fitted in the frame adjacent to the hammer circle and flattened or shouldered at o" in continuation of said circle, the pin l0 engaging said notched connecting-bar, the pivoted hammer having end l2 that engages said shoulder, the firing-pin, the trigger, the pivoted rebound-carrier, the main-spring mounted thereon, and the rebound spring J and latch-slide spring I), all constructed and organized substantially as and for the purposes set forth.

Vitness my hand this l-lfth day of November, A. D. 1892.

ANDREW FYRBERG.

Witnesses:

LETITIA J. XVEBsTER, CHARLEs S. SHATTUCK. 

